Question

The average mark obtained by Jay in four subjects is 70. He secured a total of 200 marks in mathematics, history, and science. He also secured a total of 150 marks in mathematics and English. Find the marks scored by Jay in mathematics.

• A. 80
• B. 70
• C. 60
• D. 100

Answer 1

The correct option is B 70

Average marks in four subjects = 70
Total marks in four subjects = $70\times 4=280$

The four subjects are mathematics, English, science, and history.

Marks scored in three subjects (mathematics, history, and science) = 200

Marks scored in English = Total marks – Marks scored in three subjects,
i.e., 280 – 200 = 80 marks

Marks scored in mathematics and English = 150
Marks in Mathematics = 150 – 80 = 70 marks

Thus, Jay scored 70 marks in mathematics.